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Old Feb 01, 2011, 10:01 PM
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Fayetteville NC
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T-38 talon/F-5 5" EDF

Question, I have a 5" edf unit from HobbyKing and Im itching to build something for it.IM thinking of Jetset44's F-5. Any suggestion on what % i should blow it up by.

Here are the links to the fan unit and the motor.

http://www.hobbyking.com/hobbyking/s...idProduct=4235

http://www.hobbyking.com/hobbyking/s...idProduct=4935
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Old Feb 01, 2011, 10:30 PM
SG Talon... Super Genius.
Lenox, Michigan
Joined Nov 2005
3,161 Posts
A LOT!

THat is a beast of a motor. I am guessing that you need to go more than 2x. Maybe as far as 3x.

120 amps too! Dude...

CHeck out the thread over in the EDF section. I bet someone has built one that big.
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Old Feb 02, 2011, 06:24 PM
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It is a monster. I was planning on putting it in a combat models F-16 but its so far gone that I think I should just use it to make a mold. Ill save it for a future project.

The original size of the talon is 28" wingspan and 45" LOA. He has a set of 175% plans. I think that comes out to 59" wingspan and 78" loa. Thats pretty big. I dont plan on using the full 32 volts and 10 LBS thrust. Im pretty sure I will need a serious spar and some wood structure in the high stress areas.
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Old Feb 03, 2011, 09:13 AM
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United States, VA, Herndon
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I would think that the 175% would be just fine for that fan... in fact I bet it would be INCREDIBLE...
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Old Feb 03, 2011, 05:44 PM
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I spoke with JETSET44 and he crunched his numbers, I would have to enlarge the plane by 250% before the fan would fit in the fuse. It makes sense, the fuse is pretty slender. At that size the plane would be around 112" long and 70" in wingspan. Thats a little too big. I have kayaks that are smaller. Might opt for an F-18 or an F-111, this hobby has been begging for an Aardvark.
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Old Feb 03, 2011, 06:15 PM
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Originally Posted by Wingnut31 View Post
I spoke with JETSET44 and he crunched his numbers, I would have to enlarge the plane by 250% before the fan would fit in the fuse. It makes sense, the fuse is pretty slender. At that size the plane would be around 112" long and 70" in wingspan. Thats a little too big. I have kayaks that are smaller. Might opt for an F-18 or an F-111, this hobby has been begging for an Aardvark.
Wow... That much, huh... I would have figured 175% would be close, but I'm sure Steve knows what he's talking about. I wonder if the super bandit would be the same story... it is pretty similar but shorter length I think. Might work out to be a bit more manageable. Maybe the Gripen too...

The 250% number is funny though. I was just sitting here scaling up his F14 to 250% for a LONG term build. I'm toying with the idea... not committed yet. I'm working on some modifications for retracts and dual pusher (or perhaps ducted) props. I have no where to assemble it, store it, and no way to get one this big to the field, but somehow I still feel strangely compelled to build it...
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Old Feb 03, 2011, 08:04 PM
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Well Being a Chair Force Ahk Hemmm...(Air Force) Logistics Guy I picked up a few ideas. If you can make the model modular, so that it brakes down you can fit a large model in a small space. I have a 60" Delta wing that almost 70" long. I can brake it down into sections that will fit in the back seat of my truck. Shes not finished though. Lots of carbon rods and sockets let me plug it all together.

The bandit is a good idea too. Ill tinker with that one some too.
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Old Feb 03, 2011, 08:14 PM
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Do you actually have this EDF set up in your hands or is it on order?
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Old Feb 03, 2011, 08:16 PM
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Originally Posted by Wingnut31 View Post
Well Being a Chair Force Ahk Hemmm...(Air Force) Logistics Guy I picked up a few ideas. If you can make the model modular, so that it brakes down you can fit a large model in a small space. I have a 60" Delta wing that almost 70" long. I can brake it down into sections that will fit in the back seat of my truck. Shes not finished though. Lots of carbon rods and sockets let me plug it all together.

The bandit is a good idea too. Ill tinker with that one some too.
Yeah... I'm looking at how to make the F14 "modular" and still practical. I'm sure I could make the forward fuse and vertical stabs removable, but you're still left with that BIG aft section that would be tough to make both strong AND easily broken down.

Probably going to do it anyway
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Old Feb 03, 2011, 08:36 PM
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Hummm cant think of any way to shrink that one down.
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Old Feb 03, 2011, 09:23 PM
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The 250% f-14 is ONLY 100 pages (8.5x11) tiled. 101.75"/61.75" span, 99.5" long...

I wonder if that would be some kind of record...
I do have access to a box truck any time I want it...
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Old Feb 05, 2011, 11:27 AM
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Now thats just too much. LOL
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Old Feb 11, 2011, 12:13 PM
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Now thats just too much. LOL

I agree... it was A BIT too much...
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